Portable boring and mortising machine



(No Model.)' 4 Sheets-Sheet 1.

E. K. THODEN. PORTABLE BORING AND MORTISING MACHINE.

No. 513,348. Patented Jan. 23, 1894;

-INVENTOH4 A TTORNEYS.

(No Model.) 4v Sheets-Sheen: 2.

E. K. THODE-N.' PORTABLE BORING AND MORTISING MACHINE.

No. 513,348. Patented Jan. 23, 1894.

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v A TTORNE Y-S.

m5 NATIONAL uYHolauPmNa COMPANY.

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(No Model.) 4 Sheets-Sheet 3.

' Y B. K. THODEN. PORTABLE BORING AND MORTISING MACHINE- Patented Jan.23, 1894.

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(No Model.) 4 Sheets-Sheet 4. E. K THODEN. PORTABLE BORING AND MORTISINGMACHINE.

No. 513,348. Patented Jan. 23, 1894 /fl, v a

i i l I .6 6 1 I 4 S WITNESSES; lNl/ENTOH STATES PATENT FFICE.

EDWARD K. THODEN, OF BROOKLYN, NElV YORK.

PORTABLE BORING AND MORTISING MACHINE.

SPECIFICATION forming part of Letters Patent No. 513,348, dated January23, 1894.

Application filed March 25, 1393.

To all whom it may concern: Be it known that I, E WARD K. THODEN, ofBrooklyn, in the county of Kings and State of New York, have inventedanew and useful Improvement irp-Pprtable Boring and MortisingMachinesfbffwhich the following is a full, clear, and exactdescription.This invention relates to improvements in wood boring and mortisingmachines adapted for operation by hand power, and has for its object toprovide a novel, simple and practical device of the characterindicated,which will be efficient in service,be adapted for connection to anysuitable firm support, and be detachable in its parts to facilitateclose package and convenient transportation.

To these ends my invention consists in the construction and combinationof parts, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming apart ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a front view of the device arranged as a Wood boringmachine. Fig. 2 is a partly sectional edge view on the line 22 in Fig.1, looking in the direction of the arrow 2. Fig. 2 is an enlargedlongitudinal sectional view taken opposite the arrow 2 in Fig. 1. Fig. 2is a sectional plan view on the line 22 in Fig. 2 Fig. 3 is a rear Viewpartlyin section of the improved mechanism, showing some of the interiordetails of construction. Fig. 4 is a detached rear view of a gear casethat is a part of the improvement, taken on the line 44 in Fig. 5. Fig.5 is a transverse sectional view on the line 55 in Fig. 4. Fig. 6 is adetached side view of the gear case with a wall piece removed, the viewbeing taken on the line 66 in Fig. 12. Fig. 7 is a side view of theportion of the case wall that fits upon the gear case shown in Fig. 6,opposite the arrow 7 in said figure. Fig. 8 is a front view in part ofthe improved device, arranged as a mortising machine. Fig. 9 isa partlysectional side view opposite the arrow 9 in Fig. 8. Fig. 10 is a planview of the ma chine arranged to cut mortises, and in position on apieceof wood to be operated upon. Fig. 11 is a detached front view of asupporting device that is part of the invention, and

Serial No. 467,662. (No model.)

secured upon a stable support; and Fig. 12 is a partly sectional sideview of the device broken away at the top and secured upon a portion ofa bench, the latterbeing in section on the line 1212 in Fig. 11.

There is a frame piece A, provided, which is a comparatively thin plateof metal, having a sufficient length for efficient service and madelevel on the upper edge that is toothed to form a rack a, the side edgesat proper points below vertical parts thereof beingsloped inwardly anddownwardly joining a straight lower edge, to adapt the lower frameportion to slide into a mating open recess formed in a jack block A thatwill be further described.

On the front face of the frame piece A, a longitudinal and preferablydove-tailed or under-cut groove is formed, parallel with the rack a, forthe loose engagement therewith of a mating tongue 0., which is a forwardprojection from the carrier plate B, that is designed to sustain mainportions of the machine. The plate B, is laterally elongated, andundulated on its upper edge, the top edge portion at the center beingcurved upwardly to a sufficient extent and of a proper radius a theseparts are assembled in the erection ofthe machine. The part B that isintegrally formed on the main portion B, is circular, of a reduceddiameter and extends from the edge of the part B, in the same plane,having an equal thickness therewith.

A circular recess 0, see Figs. 5 and 6, is formed mainly in the portionB and partly in B from the side of the gear case upon which the rib b isproduced, and to cover this recess a plate 0 of proper form is provided,the shape of which isindicated in Fig.7. Said plate fitting upon theportion 13 conforms edge-wise with its contour, and on the exposedsurface has a curved rib portion 1), which completes this circularprojection when placed to join the part of the rib that is formed on B.The solid portion of the gear case B, B is vertically grooved on theface nearest the carrier plate B, which groove cuts into the adjacentside wall of the circular recess 0, and is made of an equal depththerewith. In the groove mentioned a slide bar 0, is located, fittingneatly so as to freely reciprocate, said bar having a longitudinallyextending tongue 01 formed on one side edge at the center of thickness,and on the opposite side edge a similarly located series of rack teethd, these projections from the bar being adapted to slide in smallergrooves laterally produced in the opposite walls of the main groove inthe part B, the tongue d serving to stiffen the slide bar and prevent itfrom twisting in the main groove of the portion B of the gear case.

On the slide bar 0, at one edge, a spring guide bar O is sustainedparallel therewith, by the attachmentof its upper end to a bracket lug(1 the lower portion sliding through a vertical perforation in the partB'of the gear case, as shown by dotted lines in Figs. 3 and 6,. a collard being removably attached to its lower end to prevent the accidentaldisplacement of the guide bar; and on the latter a spiral spring G islocated, which presses upon the lug and the portion B of the case,thereby normally retaining the slide barO in elevated adjustment, freeto be depressed by forceapplied to the rack teeth d, as will be furtherexplained.

' Within the circular recess 0, a spur gear wheel 6, is rotatablysupported, said wheel having proper dimensions and a correct tooth pitchto adapt it to mesh with the rack teeth d. The pivotal support of thegear wheel 6, is effected by a trunnion pivot e, centrally pro jectedfrom the side of said wheel adjacent to the cover plate 0, when theparts are. in position for use, there being a perforation formed in saidplate at a proper point to permit the pivot to enter and receiverotatable support. The opposite pivot support for the wheel consists ofa. short shaft 2 that projects from the centerof' the. wheel oppositefrom the trunnion pivot e, and passes through a suitable perforation inthe wall of the portion B of the gear case, as shown in Fig. 5, theouter end of'the shaft being adapted to receive and lock fast to thesocket end of a crank handle.

D, the use of which will be hereinafter explained.

The-slide bar 0, is longitudinally and centhe bolt body, serving to bindthe gear case upon the carrier plate at any desired point of adjustmentfor said gear case.

In the operation of the machine it is desirable that the gear case B, Bbe adapted for a rocking adjustment on its pivot bolt g, to effect whicha toothed, circular rack h, is formed on the periphery of the portion Bof the case at a point opposite from the recessed portion B and nearsaid curved rack a toothed sector plate h, is pivoted by a bolt k thatpasses loosely through the plate and is fastened in the carrier plate B,as shown in Fig. 5.

A radial perforation is formed in the plate h, to receive'the end of apin lever h, as indicated by dotted lines in Fig. 3, the vibration ofthe latter serving to incline the slide bar 0 from a perpendicularplane, or restore it to said plane, as may herequired.

When the slide bar is -vertically located a perforation in. the carrier,plate B and asimilar perforation in the portion B of the gear case, arecaused to register with each other, so that the insertion of a lockingpin i, will retain the case from rocking and hold. the slide bar 0verticalwhile the pin is in engagement with the parts mentioned.

The upper end or head piece of the slide bar 0, is horizontally slottedfrom front to rear at the center of breadth in T-shape, as shown in Fig.3 at k, and above the T-slot-an intersecting narrow slot 7t" is formedtherein in the same direction, a small spur pinion 10 being rotatablysupported in the small upper slot. by its secured engagement with thetrans- Verse shaft is, located in perforations. oppositely formed in theparallel walls of the head. piece of the slide bar produced by the slotis, at such points as will permit the teeth of the .pinion to projectinto the lower slot 7c, the

shaft havinga winged head 7c on one-threaded projecting .end, and awinged nut 7.0 on its other end, to permit the shaft and. attachedpinion to be locked from rotation by'a clamping'adjustment of the nutand bolt.

In the slot loan adjustable arm 0, is fitted to slide, its body being "F-shaped in crosssecj tion and loosely engaging with the T-slot 70.

On the front end of the slidable arm 0', an

integral cylindrical enlargement of head 0 is formed, which head'is of asuitable length vertically considered to adapt it to receive and sustaina rotatable bit-stock F, F, andalso a chisel holder or stock E, that isof a somewhat different construction.

Upon the upper edge of the arm 0', a toothed rack k is formed orsecured, which is in toothed engagement with the pinion k so that arotatable movement of the latter will slide the arm in the slot itoccupies, and ad just the head 0 toward or from the head piece of theslide bar 0, as may be desired, such an adjustment of parts beingintended for the purpose of locating a boring bit or a chisel edge at aproper point on work that is to be operated upon, as will be furtherexplained.

IIO

In the'side wall of the head piece of the slide bar 0, a set screw m, isinserted loosely, said screw being permitted to have a clamping bearingon the arm 0', and retain it at any point of sliding adjustment.

The boring bit stock is shown ih Figs. 1, 2 and 2 and consists of acylindrical shank F, which fits rotatably in the vertical perforation ofthe head 0 on the arm 0, a diametrically enlarged portion F of the stockproducing a radial shoulder at 12, which bears upwardly upon the lowerend of the head 0 when the device is in service. a

The head 0 is furnished with a dog a that comprises a plate pivotededgewise near the .longitudinal center, between two ears that areprojections from said head, a locking toe n in the form of an attachedpin projecting from the body of the dog loosely into a perforation inthe head which is opposite a peripheral groove in the shank F, the otherend of the dog being pressed outwardly by a spring 01 which causes thetoe to enter the groove and retain the stock from longitudinaldisplacement and permit a free rotation of the same. The upper end ofthe shank F, is tapered and squared to fit a mating socket hole in thehub end of the crank handle G, that when in engagement therewith affordsmeans for-a rotatable movement of the stock by hand power applied to thehandle.

On the lower end of the portion F of the stocka bit holder is formed,comprising parts that will be presently described, such ends of the saidstock being axially apertured to produce an upwardly tapering squaresocket hole 0, shown in Fig. 2*, the cylindrical body F,

being also slotted oppositely outside of the socket hole for thereception of the clamping jaws 0', that are pivoted by their upper endstherein, so that their longitudinally grooved adjacent i'nner surfacesmay be caused to approach and grip the shank of a bit I, that has hadits squared and tapered upper end inserted into the socket hole 0, theseparts of the jaws being bent toward each Other to adapt them foreffective service.

An oval band 19 is a part of the clamping device of the boring bit, andas shown in Figs. 2 and 2*, consists of an elliptical band 19 thatencircles the lower portion of the stock F, and is thereto looselysecured by the set screws 19' which pass through the opposite slots 19longitudinallyformed in the band, and enter the body of the stock, thelooseness of the band permitting a sliding movement of the ring or bandin the direction of its longest diameter.

There is a set screw 19 inserted through a threaded hole in one how endof the band p, which by its proper adjustment will clamp the jaws 0'toward each other, and upon an inserted bit shank F the reverse movementof the said screw reversing the jaws which will spread apart equally,the sliding movement of the band facilitating such release.

In Fig. 9 the chisel stock E, is shown as ongaged with the arm 0, saidstock having the shank or upper part of its cylindrical body reduced indiameter so as to loosely fit within the head 0 of said arm, theshoulder q bearing on the lower surface of the cylindrical head portion0 of the arm 0' when the stock E is in position for service.

Oupped depressions are oppositely formed in the shank portion E of thestock E, for

the interlocking engagement of the toe n formed in the lower portion ofthe chisel stock E, wherein the upper end of the chisel E is insertedand removably held by frictional contact therewith, or by other means ifpreferred, this engagement of parts being shown by dotted lines in Fig.8.

The,lower portion of the mortising chisel E is shaped as is usual forsuch tools, so as to be adapted to cut freely across as Well as at eachside of a mortise slot, and have a proper clearance to avoid clogging bythe chips it cuts in the operation of mortising.

On the slide bar 0 a clamp consisting of two cross bars r, r is securedand receives vertical adjustment by the set screw bolt T that passesloosely through the rear bar 1*,

and has a threaded engagement, (not shown,) with the front bar r.

From a lateral ear on the front cross bar r, a stay rod 1- is forwardlyprojected and On the carrier plate B a spur wheel 3, is

journaled on a stud s and is thereon loosely secured by a nut 3 saidwheel being meshed with the horizontal rack a formed on the upper edgeof the frame plate A, as before mentioned; and it will be seen that ifthe plate A, is held secured by any suitable means, a rotation of thespur wheel 3 will cause the carrier plate B and parts that it sustains,to slide along on the frame plate, the direction of travel depending onthe direction of rotation given to the wheels, a clamping adjustment ofthe nut s retaining the carrier plate at any point desired. As shown thespur wheel 3, is furnished with a hub projection on the outer side,which has a number of spaced perforations s radially formed upon whichmay serve the purpose of adjustingthe sector plate It and also the spurwheel, the latter being effected by an insertion of the lever and itsvibration in a proper direction, as will be further explained.

Below on theframe plateA- there is secured a depending jack frame, whichis designed to sustain strips of wood,- which are to be operated upon bythe machine. The said jack frame is comprised of a-ba'se blo'ck A, fromwhich vertically project the spaced parallel guide bars A affixed bytheir lower ends in the base block, and penetrating slots in the frameplateA, to which they are secured by the transverse key rodu, insertedthrough aligning perforations in the frameplate and bars, said holesbeing'produced edgewise in the frame plate A, as shown by dotted linesinFigs: 3 and 9;

On the guide bars A a jack block*A- islocated, and held free to slidebya tongue'and grooved engagement of saidbars with mating slotsformed' atproper points in the j ack frame. I

The base block A, is centrally perforated and threaded to receive thejack screw A which is loosely secured by its upper end to the jack blockA as shown in- Fig. 8, thus aifording. means for a verticalslidingadjustment of the jack block-toward or from the frame plate A, the blockhaving two detent teeth w, projected from its upper. surface, as shownin Fig. 11

The'r'eis a clam'ping'bar A provided, which is supported opposite thefront face of the frame plate A by the spacedstud bolts A, that projectforwardly and horizontally from the-frame plate,the bar being perforatedat proper points to permit it to slide freely on the stud bolts, thelatter being threaded on their outer ends and having Winged nutsthereon, that by adjustment press the bar toward the frame plate.

The operation of the device is as follows:

The jack block A is secured upon a bench planksuch as J inFig. 11, atits edge, so as to permit the bars-A to lie in a vertica'lplane andcause the frame plate A and attached parts of the machine to projectabove the bench. A strip of wood: such as I,-is now clamped between thebar A andthe plate A by anadjustment of the nuts on the bolts A and thejack block A is elevated so as to embed its teeth w in the material I,While its upper face bears forcibly upon said material tosupport it inahorizontal position, and it will be seen that the provision ofthesupporting device mentionedaffords means to sustain material ofdifferent-widths as-well as thickness. The boring chuckand an auger bitofproper-dimensions are now secured to the head portion 0 of the arm 0',and the latter is adjus'tedforwardly a proper degree to locate the bitpoint at a proper point'for the formation of one hole of a series to bebored, as the initial step in the formation ofa rectangular mortise inthe piece I. If the mortise is to be produced in the stuff at a rightangle to its upper edge and the upper and lower edges thereof areparallel, the gear case B, B is adthe slide bar 0 and the attachedchisel'with its support. Should the nature of the mortise tobe formedrequire that the chisel be placed at an incline to the top" surfaceofthe material I that is being mortised; arotatable adjustment of the gearcase B", 13*; will cause such an inclination, thereby carrying the slidebar out of a perpendicular position, as shown in- Fig. 8, such aninclination being prod u'ced' by an adjustment of the sector plate 72,with the pinlever h previously mentioned:

I=n' the operationof cutting the mortiseb'y hand in the material Isuccessiv'e chips are cut by a downward sliding movement of the chiselEZ and after each cuta -forward movement of the cutting mechanism uponthe frame plate A, which is readily effected by the manipulation of thepin lever h 'and spur gear wheel 8, as before mentioned-.- When themortise-is to be completed by squaring its end toward which the cuttinghas been effected, this'is readily accomplished" by'semirotating thechisel so as to dispose" its cutting n, being manipulated to. releasetheshank E and permit" a partial rotation of the shank until the oppositesocket hole is engaged by the pin of saiddog.

When the'operator desires to-support along piece of material and forma'number of mortises init, the material may beheld by one end in a" benchvise G, and the stuff supported at proper points by a pin y that prejects from the side of thebench J, as shown in Fig. 10, the improvedhand power machine beingsecured by its clamping piece at any point whereitm'a y be desirable to-produce a mortise. If it should be desired tooperate the machine by foot power as well. as hand power for themortisi'ng of the materiah achain B may be attached to a ring orloop athat projects from thelower'end of the slide f bar 0, the chain beingdownwardly extended 3 to engage with a common treadle piece-(not shown).

InFig. 12 a means is shown for using the improved machine on materialthat is laid uponthe'bench J; in this case the key rodu,

is'withdrawn and the guide bars A aremade to engage the frame plate A inreversed order, and the pin restored toplace so as to secure the partstogether, the plate being thus turnedso as to project thegear case B, Band slide bar 0, with the other parts supedgein an opposite position,the locking dog IIO ported thereby, over the top of the bench and theWork placed thereon which has been clamped by the bar A and nuts on thebolts A so as to retain the material in connection with the boring and,mortising mechanism that are manipulated as has been before explained.

One of the importantfeatures of advantage claimed for this deviceis thatits parts are all separable and capable of packing into a small box fortransportation; and as the entire machine is of comparatively smalldimensions it will be seen that a wood workercan carry the entire devicealong with him in his general tool chest, and thus be provided with ameans by which to rapidly and perfectly out mortises in material wheresuch stuff cannot be had at mills that make a specialty of its production. it

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. In a portable wood boring machine, thecombination with a frame plate, an attachable and adjustable support formaterial, a slidable carrier plate and means to move said plate and lockit, of an upright reciprocating and inclinable slide bar, a seourablerocking support therefor, and a rotatable wood boring device thereon,substantially as described.

2. In a portable boring machine, the combination with a frame plate, anattachable and adjustable support for material, a slidable car rierplate, means to move said plate and means to lock it, of an uprightreciprocating and inclinable slide bar, a spring support adapted toelevate said bar, connected gearing and a handle lever to depress thebar, a horizontally adjustable arm on the upper end of the slide bar anda rotatable wood boring device on the arm,substantially as described. 3.The combination with a frame plate, spaced depending guide bars, aslidable jack block,a base block, and a screw in the block, of a carrierplate adapted to slide longitudinally, and a device to slide the carrierplate and a means to secure said plate, a slotted rocking and seourablegear case, a slide-bar engaging the slot in the gear case, a toothedrack on said bar, a horizontal adjustable arm on the upper end of theslide bar, a spring support therefor, and a rotatable wood boring deviceon said arm, substantially as shown and described.

4:. ,The combination with a frame plate, a

seourable jack block loosely engaging guide bars which are detachablyaffixed by their upper ends to the frame plate, a base block on thelower end of the guide bars, a jack screw,

.5. The combination with a frame plate, a

seourable jack block loosely engaging guide bars which are detachablyaffixed by their upper ends to the frame plate, a base-block centrallyperforated and threaded, fast on the lower ends of the guide bars, ajack screw in the block, a laterally slidable carrier plate, means toslide this plate, and means to secure said plate, of a transverselyslotted rocking and seourable gear case, a longitudinally slottedslidebar therein, an adjustable arm on the upper end of the slide bar, aspring support therefor, rack teeth on the slide bar, a pivotedgear-wheel in the case, adapted to mesh with said rack teeth, a handlelever for said wheel, an adjustable chisel stock on the arm of the slidebar, and an adjustable guiding device therefor projected from the slidebar, substantially as described.

EDWARD K. THODEN. Witnesses:

E. M. CLARK, F. W. HORNAFORD.

